Chandeleur Island is one of the most renowned fishing destinations in the Gulf of America. Its expansive seagrass beds support a highly productive speckled trout fishery, and also provide important nursery and forage habitat for many other important fisheries species including red drum, tarpon, Gulf sturgeon, and gray snapper. Chandeleur Island and the associated seagrass meadows are rapidly eroding and projected to dramatically change in the coming years. The Louisiana and Open Ocean Trustee Implementation Groups anticipate allocating $247M to restore Chandeleur Island with an objective of protecting and enhancing the seagrass meadows and the associated ecosystem services. To characterize the fisheries benefits of this project, we developed a strategy to 1. estimate the amount of fisheries production attributable to project actions and 2. characterize how these benefits reach across the Gulf through trophic pathways and fish migration. Our approach leverages large-scale investments in data collection and modeling funded by the NOAA RESTORE Science Program, National Fish and Wildlife Foundation’s Gulf Environmental Benefit Fund, and others. While existing data are quite extensive, some substantial gaps remain and future work is needed to characterize the system post-restoration. Therefore, we propose new data collection to supplement and extend historic data collection efforts, as well as the establishment of new time series. These data will be synthesized using a combination of ecosystem models, stable isotope models, and analysis of tagging data to clearly articulate the benefits of this ecosystem-level restoration project. At the time of writing, the Louisiana and Open Ocean Trustees are evaluating proposals to implement this work.